fix(i18n/ind): anchor ind_pan so trailing characters are rejected

ind_pan used re.match(r"[A-Z]{5}\d{4}[A-Z]{1}", ...) with no trailing $,
so any string starting with a valid PAN was accepted -- e.g.
ind_pan('ABCDE9999KEXTRA') returned a match. Anchor the pattern with
^...$, matching the ind_aadhar style just above it.

Author: Jordan-Bourillot

src/validators/i18n/ind.py

@@ -44,4 +44,4 @@ def ind_pan(value: str):
         (Literal[True]): If `value` is a valid PAN card number.
         (ValidationError): If `value` is an invalid PAN card number.
     """
-    return re.match(r"[A-Z]{5}\d{4}[A-Z]{1}", value)
+    return re.match(r"^[A-Z]{5}\d{4}[A-Z]{1}$", value)

tests/i18n/test_ind.py

@@ -26,7 +26,9 @@ def test_returns_true_on_valid_ind_pan(value: str):
     assert ind_pan(value)
 
 
-@pytest.mark.parametrize("value", ["ABC5d7896B", "417598346012", "AaaPL1234C"])
+@pytest.mark.parametrize(
+    "value", ["ABC5d7896B", "417598346012", "AaaPL1234C", "ABCDE9999KEXTRA"]
+)
 def test_returns_failed_validation_on_invalid_ind_pan(value: str):
     """Test returns failed validation on invalid ind pan."""
     assert isinstance(ind_pan(value), ValidationError)